Mild Steel EN8
Materials Mild Steel EN8 (080M40)
Description
EN8 is a medium carbon steel without added alloys, commonly used when higher performance is needed compared to mild steel, but alloy steel would be too expensive. It can be heat-treated through methods like flame or induction hardening to achieve a hard surface and reasonable wear resistance. EN8 is widely used across various industries, from automotive to general engineering, due to its reliable properties and cost-effectiveness
Key Features
- Unalloyed medium carbon steel
- Reasonable tensile strength
- Can be flame or induction hardened
- Readily machinable
- Moderate wear resistance if heat treated
Applications
- Automotive parts
- Connecting rods
- Studs, bolts
- Axles, spindles
- General engineering components
Availability
- Round bar
- Square bar
- Hexagon bar
- Flat plate
| Chemical Composition (Weight %) | ||
| Min | Max | |
|---|---|---|
| C | 0.36 | 0.44 |
| Si | 0.10 | 0.40 |
| Mn | 0.60 | 1.00 |
| P | 0 | 0.05 |
| S | 0 | 0.05 |
| Material Properties | |
| Machinability | Good |
| Weldability | Good |
| Formability | Poor |
| Corrosion Resistance | Very Poor |
| Related Material Specifications | |
| BS970 (1955) | EN8 |
| BS970/PD970 (1970 On.) | 080M40 |
| European | C40, C45, Ck40, Ck45, Cm40, Cm45 |
| Werkstoff No. | 1.0511, 1.1186, 1.1189 |
| US SAE (AISI) | 1039, 1040, 1042, 1045 |
| Mechanical Properties | |
| Tensile Strength | 700 N/mm² |
| Yield Strength | 465 N/mm² |
| Shear Strength | 330 N/mm² |
| Elongation | 16 % |
| Hardness | 201 Brinell |
| Thermal Conductivity | 51 W/m.K |
| Coefficient of Thermal Expansion | 1.1 x 106 /K |
| Elastic Modulus | 205000 Mpa |
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